SK-20 micro smoke alarm with 3V lithium battery for 10 years

• Photoelectric sensor for ultimate protection.• Big Test/Silence button at front cover for more convenient userinteraction.• 10 years lithium battery – no battery changes for ever.• Install simply and quickly using screws (included) or almost instantlywith unique 3M VHB adhesive tape.• Test: button for testing smoke alarm’s correct functioning whenpush the button more than 0.5 seconds.• Low Battery warning or The Chamber test fail warning: If eitherthe low battery test or the chamber test fails, the horn will beep10ms every 43 seconds until the failing condition passes. If twoconsecutive chamber test fails, the horn will pulse on three timesfor 10ms, separated by 330ms every 43 seconds, Each of the twosupervisory test audible indicators is separated by approximately20 seconds.• Low battery hush: If a low battery condition exists, the horn willbe silenced for 8 hours after pressing the test button.• Silence function to silence false alarms and temporally desensitizingsmoke alarm, just press and release at once.• End of Life Indicator: Afte r 10 years of powered ope ration, anaudible warning will occur indicating that the detector shouldbe replaced.• Local Alarm Memory: the feature allow easy identification of anyunit that had previously been in a Local Alarm condition.• Approval: EN14604:2005 by LPCB & VDS